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Cuban Missile Crisis
October 1962· Event· Americas & Oceania
Well documentedSolid records, physical evidence or scientific consensus.
A 13-day standoff in October 1962 over Soviet nuclear missiles in Cuba, the closest the world has come to nuclear war.
See it on the History map →What happened
The USSR secretly placed nuclear missiles in Cuba, 90 miles from Florida, partly to protect Fidel Castro after the failed US-backed Bay of Pigs invasion and to offset US missiles in Turkey. A US spy plane photographed them on October 14. President Kennedy ordered a naval 'quarantine' of the island. After tense days, Nikita Khrushchev agreed to remove the missiles in exchange for a US pledge not to invade Cuba and a secret promise to pull US missiles from Turkey.
Why it matters
Both sides stepped back from the brink, set up a Washington–Moscow hotline in 1963 and signed the first nuclear test-ban treaty, starting decades of arms control.
How we know
Kennedy's secretly taped White House meetings, declassified US and Soviet documents, and conferences of surviving participants from 1987 to 2002.
Still debated
Later revelations showed greater danger than anyone knew: Soviet battlefield nuclear weapons on Cuba, and a submarine officer, Vasili Arkhipov, who reportedly blocked a nuclear torpedo launch.
Connections (2)
▸Atomic bombings of Hiroshima and Nagasaki showed what was at stake in the Cuban Missile CrisisMostly agreed
The connection
Hiroshima and Nagasaki showed what a single bomb could do to a city. By 1962 both superpowers had hydrogen bombs tens to thousands of times more powerful. Leaders on both sides understood the stakes, and that knowledge pushed Kennedy and Khrushchev to look for a way out rather than escalate.
When and how
Japan, August 1945; then Washington and Moscow, October 1962, where Kennedy and Khrushchev exchanged letters about avoiding catastrophe.
How sure are we?
Khrushchev's letters to Kennedy and the White House tapes refer directly to nuclear devastation; the hotline and test-ban treaty followed.
Debates and open questions
Whether nuclear deterrence kept the peace in 1962, or the world was simply lucky, is still debated.
▸Cuban Missile Crisis was the nearest to nuclear war of the Cold WarWell documented
The connection
For 13 days the superpowers stood at the edge: Soviet missiles in Cuba could hit much of the US within minutes, and US nuclear forces went to DEFCON 2, their highest alert ever. The scare pushed both sides into a calmer phase, with a hotline and the 1963 Limited Test Ban Treaty.
When and how
October 16–28, 1962, in Washington, Moscow and Havana; Kennedy, Khrushchev and Fidel Castro.
How we know
Declassified records and participants' accounts agree it was the closest call; Defense Secretary Robert McNamara later said luck helped prevent nuclear war.
Debates and open questions
Other near misses, such as a 1983 Soviet false missile alarm and NATO's Able Archer exercise that year, may have been close too; ranking them is debated.